Editor's note: This column is the first in a recurring series highlighting issues surrounding data and the real estate industry. Tech and real estate industry strategists Gahlord Dewald and Rob Hahn will host the first-ever Inman Data Summit, scheduled on July 25-26 in San Francisco, leading up to the Real Estate Connect conference.CORRECTION: This column has been updated with a correction. NAR directors approved a broker opt-in related to the franchisor IDX policy, and NAR's MLS policy committee will revisit the issue during the group's annual meeting in November. Recently, in a note to tech vendors working in the real estate space, I mentioned how an understanding of industry policies is required to have any success. The technology and the data are often the simplest parts. The ...